The best way we’ve found is to call Context.getCacheDir
on startup, get its path with getAbsolutePath
, then call a JNI function to store that path in a global. Any function that wants to create a temporary file simply appends a suitable temporary file name to that path.
If you really want to fetch it from JNI another alternative would be to pass in a Context
to a JNI function and use a bunch of GetMethodID
/ CallObjectMethod
stuff to call back into Java to getCacheDir
, but the former approach is a lot simpler.
Unfortunately, there does not appear to be a more elegant solution at the moment.